Apparatus for cementing the ends of inner tubes in preparation for splicing



F. H. TENNEY APPARATUS FOR CEMENTING THE ENDS OF INNER TUBES IN PREPARATION FOR SPLICING Filed Aug. 19, 1926 Feb. s 1929.

I N VEN TOR.

A TTORNEY) Patented Feb. 5,1929.

' UNITEDSSTATES FREDERICK E. 'TENNEY, OF AKRON, O HIO, ASSIGNOR TO THE FIRES' IONE TIRE AND RUBBER COMPANY, 01 AKRON, OHIO, A. CORPORATION OF OHIO;

APPARATUS FOR onunnmmo mu nuns or mimn mm: m rnnmnarron Ion SPLIGING. I

application filed au ust 19,1926. Serial no. 130,186.

This invention relates to apparatus'for use in-cementing the ends of inner tubes of rubber In the manufacture of inner tubes, rubber .6 is formed into a tube on either straight or curved mandrels and the tubes are vulcanized thereon. Subsequently they are stripped therefrom and the ends skived and cemented in preparation for the splicing operation by 1 which one cemented end is inserted into the other and the spliced ends cured by either hot or cold vulcanization.

Heretofore the cementin been performed by hand.

operation has ince 1n modern practice the various splicing operations are performed on the tubes while on a traveling conveyor, this hand cementing operation "has necessltated a low speed conveyor and employment of several cementing operatives for I each conveyor.

The present invention has for its general purpose the provision of apparatus for cementing the ends of inner tubes in preparation for splicing in a quick, efficient manner trated in the accompanying drawings and described below. It is understood that the invention is not limited to the s ecific form thereof illustrated-and describe Of the accompanying drawings, Figure 1 is a side elevation of an appara' tus embodying the invention;

Figure 2 is a rear elevation thereof; Figure 3 is a plan thereof; and Figure 4 is a detail section through the cement tank,'pump and tube cementing instrumentalities.

Referring to the drawings, 10 represents a suitable supporting frame on which is mounted a tank llfor providing a supply of rubber cement indicated at 12. Extending u wardly into tank 11 through the bothereof are shafts 13 and 14 whichrare has a ertures 16, 18 therein whereby cement may ow from receptacle 17 through cup 15 in preparation for splicing the ends together\so as to flow as a film down the inner surface thereof, and also has apertures 19, 19 in the bottom thereof from whichthe cement can empty into tank 11. In order to hold the end of the tube against the wall of cup '15,

an air pressure supply pipe 20 may be arranged about shaft 13 in tank 11 so as to connect the inside ofthe on through aperture 21, 21 to a'pressure supp y line 22.

Cup 16 is arran ed to receive cement directly therein an has apertures 23, 23

through its wallsfor conducting cement from the inside of the cu Y outwardly so as to flow downwardly as a fi m over the outer surface of the wall of the cup.

Supply of cement to receptacle 17 and cup 16 is preferably accomplished by means ofa pump .24 arranged in tank 11 and adapted toclraw cement from said tank through a check valve 25 and to deliver itto a conduit 26 through a check valve 27, conduit 26 having a branch 28 emptying'into receptacle 17 and a branch 29 emptying into cup 16.- Pump 24 preferabl includes a single-action piston 24 so that -t e discharge of cement into cup 16 will be intermittent.

Driving of umps 24 and of shafts 13 and 14 may be e ected by any suitable mechanism, a main drive shaft 30 bein herein shown as providediwith a drive PIDlOIl 31 meshed with a gear 32arranged to drive the pump 24 through sprocket 33, chain 34, sprocket 35, crank 36 and pitman 37, which is connected to a slide 38 to which latter piston rod 24 of pump 24 is connected. Drive shaft 30 is also provided with a driving inion 39 meshed with a gear 40 which drlves a gear 41 meshed with gears 42 and 43 respectively on shafts 13 and 14.

In using the apparatus, the cups 15 and 16 are continuously driven and pump 24 intermittently delivers streams of cement to receptacle 17 and cup 16, whereby a film of cement runs 'down theinner wall of cup 15 and the outer wall of on 16. Air under pressure is continuously d ivered to the interior of cup 15.

An operative seizes one end of each tube as they pass on a conveyor (not shown) and inserts 1t in cup 15, the air therein blowing it out into contact with the inner wall of the on whereby the outside of the tube is coated with cement adjacent its end. This tube end is held in the cup only an instant and 1s then withdrawn. The operative, or in some cases, another operative then seizes the other end of the tube on the conveyor and, timing h s operation with that of the pump, places it about the 'Wall of cup 16 during the nonpumping stroke of the piston so that cement from branch 29 will not be sprayed onto the outside of the tube. It will be noted in this relation that the branch 29 of pipe 27 does not project over cup 16, but is so placed as to direct its stream therein from beyond the edge thereof so that mounting of the tube about the cup will not be interfered with. By this operatlon the inside of the other end of the tube is coated with cement. Accordingly, after the usual drying process, the first end can be inserted in the second end to make the splice.

The rotating cups 15 and 16, in addition to supplying the film of cement, act as Spreaders to apply an even coating of cement on the ends of the tubes in a very short time. They greatly speed up the end-cementing operation and at the same time accomplish it better than by hand with fewer operatives.

Modifications of the invention may be resorted to without departing from the spirit thereof or the scope of the appended claims.

What is claimed is:

1. Apparatus for coating ends of tubes in preparation for a splicing operation, said apparatus including a tank for providing a supply of cement, cu s rotatable above the tank, one of said cups heing surrounded by a receptacle for cement and having apertures therein through which cement can flow from the receptacle down the inside of the wall of the cup, and having apertures through its bottom through which cement may empty into said tank, means for supplying air under pressure into said cup to blow the tube against the wall thereof, the other cup having apertures therein through which cement may flow from the other cup down the outside of its wall, a single acting pump arranged in the tank to pump cement therefrom; a conduit leading from the delivery side of the pump and having branches for delivering cement respectively to the receptacle and the second, cup and means for rotating the cups and operating the pump.

2. Apparatus for coating ends of tubes in preparation for a splicing operation, said apparatus including a tank for providing a supply of cement, cups rotatable above the tank, one of said cups being surrounded by a receptacle for cement and having apertures therein through which cement can flow from the receptacle down the inside of the wall of the cup, and having apertures through its bottom through which cement may empty into said tank, the other cup having apertures therein through which cement may flow from paratus including a tank for providing a supply of cement, cups rotatable above the tank, one of said cups being surrounded by a receptacle for cement and having apertures therein through which cement can flow from the receptacle down the inside of the wall of the cup, and havin apertures through its bottom through whic cement may empty into said tank, means for supplying air under pressure into said cup to blowthe tube against the Wall thereof, the other cup having apertures therein through which cement may flow from the other cup down the outside of its .wall, a single acting pump arranged in the tank to pump cement therefrom, and a conduit lead ing from the delivery side of the pump and having branches for delivering cement respectively to the receptacle and the second cup.

4. Apparatus for coating ends of tubes in preparation for a splicing operation, said apparatus including a tank for providing a supply of cement, cups rotatable above the tank, one of said cups being surrounded by a receptacle for cement and having apertures therein through which cement can flow from the receptacle down the inside of the wall of the cup, and having apertures through its bottom through which cement may empty into said tank, the other cup having apertures therein through which cement may flow from the other cup down the outside of its wall, a single acting pump arranged in the tank to ump cement therefrom, and a conduit lea ing from the delivery of the pump and having branches for delivering cement respectively to the receptacle and the second cup.

5. Apparatus for coating ends of tubes in preparation for a splicing operation, said apparatus including a tank for providing a supply of cement, cups rotatable above the tank, one of said cups being surrounded by a receptacle for cement, from which cement may flow down the inside of the wall of said cup, means for supplying air under pressure into said cup to blow the tube against the wall thereof, the other cup being adapted to deliver a film of cement to'the outside of its Wall, a single acting pump arranged in the tank to pump cement therefrom, and a conduit leading from the delivery side of the pump and having branches for delivering cement respectively to the receptacle and the second cup.

6'. Apparatus for coating ends of tubes in spectively to the receptacle and the second Apparatus for cementing the end of a tube in preparation for a splicing operation, comprising a tank for containing a supply of cement, a cup rotatable above the tank and surrounded by a receptacle from which a film of cement may flow down the inside of the cup wall, a pump in the tank arranged to deliver cement therefrom to said receptacle, and means for supplying air under pressure to the cup.

8. Apparatus for cementing the end of a tube in preparation for a splicing operation,

comprising a tank for containing a supply.

of cement, a cup rotatable above the tank and surrounded by areceptacle from which a fihn of cement may flow down the inside of the cup wall, and a pump in the tank arranged to deliver cement therefrom to said receptacle.

9. Apparatus for cementing the end of a tube in preparation for a splicing operation,

said apparatus including a rotatable, hollow, cylindrical member, means for supplying a film of cement to the inside of the wall of said member, and means for supplying air under pressure to the inside of the member.

10. Apparatus for cementing the outer surface of the end of a tube in preparation for a splicing o eration, said apparatus including a rotata le, hollow, cylindrical member, arranged to receive an innertube therein, and means for supplying a film of cement to the inside of the wall of said member.

11. Apparatus for cementing the end of a tube in preparation for a splicing operation, said apparatus including a tank for containing a supply of cement, a cup rotatable above the tank, a ump for intermittently delivering cement @0111 the tank into the cup, the cup being constructed so that the cement will flow as a film down the outer surface thereof, and means connected to the delivery side of the ump for directing the cement into the cup mm a point in uno structing relation thereto.

12. Apparatus for cementing the end of a tube in preparation for a splicm operation, said apparatus including a tank or containing a supply of'cement, a cup rotatable above the tank, and a pump for intermittently delivering cement from the tank into the cup, the cup being constructed so that the cement will flow as a film down the outer surface thereof.

FREDERICK H. TENNEY. 

